I have a form using 1 custom select2 I'm trying to implement from here: https://github.com/wasikuss/select2-multi-checkboxes

I'm populating the option values with an array in my datastore. The Select shows fine and the correct options are shown. But when I press Generate report values aren't passed.

      <form method="post" id="filterform">
          <div class="row">
              <div class="col-md-4">
                  <div class="form-group">
                      <b>Filter Location </b>

                        <select name="sel-02" id="sel-02" class="form-control select2-multiple2" form="filterform" multiple>
                            <?php
                                $locations = $this->dataStore("location_names")->pluck("name");
                                foreach($locations as $item){
                                    echo "<option value='strtolower($item)'>$item</option>";
                                }
                            ?>
                        </select>
                  </div>
                  
                  <button onclick="clear_filter()">Reset all</button>
                    <script type="text/javascript">
                        function clear_filter()
                        {
                            $('#loc_name').val(null).trigger("change");
                            $('#prog_name').val(null).trigger("change");
                            $('#current_status').val(null).trigger("change");

                        }
                    </script>
                  <div class="form-group" style="margin-top:10px;">
                      <button class="btn btn-lg btn-primary">Generate Report</button>
                  </div>
              </div>

           </div>

      </form>

Is there an issue with how I'm setting up my form?

Solved. Didn't specify select name.